Android 《PopupWindow 仿微信下拉菜单》

布局文件

popup_menu.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:orientation="vertical"
    android:layout_height="match_parent"
    android:background="#2f2f32"
    >
    <TextView
        android:id="@+id/btn_pop_1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textColor="@color/white"
        android:paddingRight="@dimen/dp_10"
        android:paddingStart="@dimen/dp_10"
        android:paddingTop="@dimen/dp_5"
        android:paddingBottom="@dimen/dp_5"
        android:drawableStart="@drawable/common_history"
        android:drawablePadding="@dimen/dp_5"
        android:text="查看历史"/>
    <TextView
        android:id="@+id/btn_pop_2"
        android:layout_marginTop="@dimen/dp_5"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textColor="@color/white"
        android:paddingRight="@dimen/dp_10"
        android:paddingStart="@dimen/dp_10"
        android:paddingTop="@dimen/dp_5"
        android:paddingBottom="@dimen/dp_5"
        android:drawableStart="@drawable/common_delete"
        android:drawablePadding="@dimen/dp_5"
        android:text="清除暂存"/>
</LinearLayout>

Activity

MenuActivity.java

 @Override
    protected void initRightIcon() {
        toolBarBuilder.setRightIconRes(R.drawable.common_righticon2);
        toolBarBuilder.setRightIconVisibility(View.VISIBLE);
        toolBarBuilder.setRightIconClick(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Log.i("xian","RightClick");
                showPopup();
            }
        });
    }

    private void showPopup(){
        if(popupWindow_view == null){
            popupWindow_view = LayoutInflater.from(this).inflate(R.layout.popup_menu, null);
        }
        if(popupWindow == null){
            popupWindow = new PopupWindow(popupWindow_view, ActionBar.LayoutParams.WRAP_CONTENT,ActionBar.LayoutParams.WRAP_CONTENT,true);
            Log.i("xian", popupWindow_view.getWidth()+"");
            //设置菜单显示位置
            //兼容5.PopupWindow
            popupWindow_view.setOnTouchListener(new View.OnTouchListener() {
                @Override
                public boolean onTouch(View view, MotionEvent motionEvent) {
                    Log.i("xian","popupWindow_view click");
                    // 必须写v.performClick();解决与单机事件冲突
                    switch (motionEvent.getAction()){
                        case MotionEvent.ACTION_DOWN:
                            if(popupWindow != null && popupWindow.isShowing()){
                                popupWindow.dismiss();// 隐藏菜单
                                //popupWindow = null;
                            }
                            break;
                        case MotionEvent.ACTION_UP:
                            view.performClick();
                            break;
                        default:break;
                    }
                    return false;
                }
            });
            TextView btn_pop_1 = popupWindow_view.findViewById(R.id.btn_pop_1);
            btn_pop_1.getPaint().setFlags(Paint.ANTI_ALIAS_FLAG);

            TextView btn_pop_2 = popupWindow_view.findViewById(R.id.btn_pop_2);
            btn_pop_1.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    Log.i("xian","btn_pop_1 click");
                    popupWindow.dismiss();
                }
            });
            btn_pop_2.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    Log.i("xian","btn_pop_2 click");
                    popupWindow.dismiss();
                }
            });

        }
        popupWindow.showAsDropDown(toolBarBuilder.getRightTv(),-20,toolBarBuilder.getToolbar().getHeight());

    }

实现效果